Crane.



No. 655,522'l Patented Aun. '7, |900.

.1. w. sEAvEn a s. T. wELLMAN.

G R A N E.

(Application flied July 21, 1898.)

3 Sheets--Sheet I.

(No mmm.)Y

No. 655,522. Patented Aug. 7, :900. .1. w. sEAvl-:R @L s. T.` wELLMAN.

C R A N E.

(Application iled July 21, 1898.)

3 Sheets-Shut 2l (No Modal.)

No. 655,522. Patented Aug. 7, |900. J. W. SEAVER & S;- T. WELLMAN.

' C R A N E (Application lad July 21, 1898.)

3 Sheets-Sheet 3,

(No Medel.)

Uivrrnn 'STATnr ArnNT netos?.

JOHN W. SEAVER AND SAMUEL T. VELLMAN, OF CLEVELAND, OHIO, ASSIGNORS TOTHE lVELLMAN-SEAVER ENGINEERING COMPANY,

OF SAME PLACE.

CRANE.

SPECIFICATON forming part of Letters Patent No. 655,522, dated August 7,1900.

Application filed July 2l, 1898. Serial No'. 686,522. (No model.)

To all whom t muy concern:

Be it known that we, JOHN W. SEAVER and SAMUEL T. WELLMAN, citizens ofthe United States, and residents of Cleveland, Ohio, have inventedcertain Improvements in Cranes, of which the following is aspecification.

Our invention consists of a crane intended especiallyfor use on piers orwharves,althougl1 applicable for other purposes where a crane having aprojecting boom is required, the ob-V ject of our invention being Vto soconstruct the crane that itwill be of simple construction, quickact-ing, of large capacity, and willhave a wide range of action both onthe pier and on a vessel docked alongside said pier.

In the accompanying drawings, Figure l is a side view of a craneconstructed in accordance with our invention and showing the boom drawnin. Fig. 2 is a similar view of the crane, showing the boom run out.Fig. 3 is an end view of the crane. Figs. Il and 5 are side views ofmodiied forms of crane embodying the invention, and Fig. 6 is an endview of the crane shown in Fig. 5.

Fitting-out piers, such as form part of a modern shi p-yard plant, areusually equipped either with stationary shears or with derricks havingrevolving j ibs; but both of these structures have a limited range ofaction and are attended with more or less inconvenience in operation,and the floating derricks which are sometimes used are also troublesome,besides being expensive. The crane which we have devised covers a largeiield of action upon the wharf or pier and may, if desired, cover theentire area of the same, and it enables a load to be quickly andaccurately placed in anydesired position on board a ship or other craftwhich may be lying at the wharf or aords equal facility for the transferof loads from the craft to the wharf.

The invention consists of a traveling crane or gantry composed of agirder l, supported at each end by a frame or legs 2 and carrying asliding boom 3. The girder 1 is preferably composed of opposite channelbars or beams, which may be suitably connected or braced at the rearends, but provide a free space between the front ends for the passage ofthe hoisting rope or chain, and the boom 3 may consist of opposite beamsor bars connected at each end and provided with one or more trolleys 4,each having suitable hoisting mechanism. The end frames or legs 2 of thecrane are mounted upon trucks which have wheels running upon railson thewharf or pier, and the crane may be caused to travel up and down saidwharf by means of powerdriven mechanism of an y available character. Thesliding boom is provided with suitable 6o roller-bearings on thecrane-girder, so thatit can be run out beyond the edge of the wharf foras much of its length as desired, a suiilcient part of the length of theboo-m being always retained in board to steady and hold it.

In the construction shownin Figs. 1, 2, and 3 the boom runs upon rollers5 at the front end of the girder l and carries at its inner end rollers6 and 7, running, respectively,

upon the upper andlowerlianges of the beams 7o Y constituting saidgirder, so as to prevent tipping or tilting of the boom when the same isrun out.

Mechanism of any desired character having as its motive powerelectricity, air, water, or steam may be used for imparting movement tothe boom 3, and like mechanism may be used for traversing the trolleys 4on the boom or for operating the hoisting mechanism of said trolleys,these details forming no 8o essential part of our present invention andbeing modified to suit the requirements of any particular case.

The end frames or legs, whichsupport the girder l, are so arranged thatthe boom 3,with its trolleys and load, can pass between said legs, andfor this purpose the legs may be strengthened or braced over the top ofthe girder l, as shown at S in Fig. 3, and spread at their lower ends tosuch an extent as to 9o afford a proper base for the crane. At or nearthe bottom the legs may also befconnected together by means of atiebeam-suoh, for instance, as shown at 9 inyFig. S-or the strength andconstruction of the legs maybe such that they will maintain themselvesproperly without the use of this lower tie-v beam so that the load willnot have to be lifted over the same as the boom is run in or out.

We prefer to use on the boom 3 two trol- Ioo leys, the outer one beingdesigned for light loads and the innerl one for'heavy loads, and theheavy trolley, with or Without a load, may, if desired, be used as acounterweight for the boom by running it into or toward the inner end ofthe same Whenthe other trolleyvis run ont to or toward the outer end ofthe boom; or, in order to counterweight and prevent tipping of the maincrane structure When the boom is extended and carries a load at theoutboard end, the inner trolley may, as shown by dotted lines in Fig. 2,be run onto a shelf or platform 10, secured to the inner frame or., legs2, weight being suspended from the trolley or the Weight being otherwiseapplied to the inner frame or legs, as desired. In place of a movingtrolley or trolleys the boornmay have one or'more sets of stationarylifting-- gear, asdesired, the movable trolleys being,

however, alwayspreferred. i

It vWill ybe evident ythat With Aa crane -con-` structed in accordance.with our inventiona load can be lifted'from anyplace on the'wharfWithin the `field `of the crane, and the-crane; can then be traversedalong thewvhaif untily it reaches a position directly abreast that@point on the ship vat which it is desired toi place the load, whereupontheboom 3 can be@ run out over the ship and the trolley moved along onthe boom until the load is in the eX- act position in which it isdesired toplace it,; the load being vvhandled Without obstruction by themasts of the ship or other obstacles;

and the crane readily-accommodating itself to the exigencies of anyservice which may bei` required.

In the modified form of crane shown in Fig.

4 brackets 1l on the'girder l carry rollers 12 for bearing upon the topof the boom andi steadying the same, while in Figs. 5 4and 6;

`which said invention appertains.

Hence,.without limiting ourselves to the dei tails ofv constructionwhich We have shown' and described, We claim and desire to secure byLetters Patent-L 1. A crane consisting of a girder, traveling end framesor legs supporting saidigirderl and laterally braced or connectedabovethe same,

`and afsliding boom mounted on said girder, i vsubstantially asspecified.

2. A traveling crane havingagirder and a boom mounted so as to yslidethereon, said boom having a pairvof independently-'moving Atrolleyswhereby one of 4said vtrolleys may be used as a counterweight-When theLother is lifting, substantiallyvas speciied 3. A travelingfcrane havingagirder with boom mounted thereon so Vas tobe free Lto Vslide,rappair ofindependently-movable trol; leys for said boom, and a xedshelf orVVplatform on the craneistructure for the :reception 'of the innertrolley, substantiallyas-speciiied.

'In testimony whereof kWe-have ysignedzou-r names to vthis specificationin the presenee'oi- .two subscribing witnesses.

JOHN'W- SEAVER. V

SAMUEL T. WELLMAN. Witnesses:

lC. W. CoMsToCK,

JOHN MCGEORGE.

